Table 1.
Characteristics of the Extramural Leiden University Medical Center Academic Network (ELAN) population, by data source, 2007–22, and the population of the Netherlands, 2014
| ELAN |
|||||||
|---|---|---|---|---|---|---|---|
| Characteristic | SN a | GPs b | Hospitals c | MHC d | Perined children e | Perined mothers e | The Netherlands f |
| Total populationg | 2 611 953 | 734 519 | 2 168 282 | 409 020 | 371 035 | 239 615 | 16 829 289 |
| Mid-year population 2021h | 1 719 617 | 572 930 | 1 595 887 | 286 572 | 316 760 | 183 964 | 17 533 043 |
| Women (%) | 50.0 | 51.5 | 51.2 | 54.1 | 49.0 | 100.0 | 50.0 |
| Age (years) [mean (SD)] | 31.7 (22.6) | 32.1 (23.6) | 32.3 (23.0) | 33.0 (20.0) | 2.1 (4.1) | 29.2 (7.8) | 41.0 |
| Person-years [median (IQR)] | 12.4 (3.7–16.0) | 16.0 (8.1–16.0) | 15.4 (6.5–16.0) | 16.0 (7.6–16.0) | 10.7 (5.5–16.0) | 16.0 (8.7–16.0) | NA |
| Age category (years) (%) | |||||||
| <18 | 27.8 | 32.4 | 28.9 | 23.6 | 96.9 | 6.9 | 20.2 |
| 18–65 | 63.1 | 57.6 | 61.4 | 68.2 | 3.1 | 93.1 | 61.9 |
| ≥65 | 9.1 | 10.0 | 9.7 | 8.3 | NA | NA | 17.9 |
| Urbanization (addresses/km2)i (%) | |||||||
| Extremely urbanized (>2500) | 66.6 | 58.2 | 64.8 | 69.7 | 66.0 | 68.8 | 21.0 |
| Strongly urbanized (1500–2500) | 17.1 | 32.5 | 18.4 | 16.6 | 19.7 | 18.8 | 24.1 |
| Moderately urbanized (1000–1500) | 13.0 | 6.8 | 13.1 | 11.1 | 11.4 | 9.8 | 17.9 |
| Hardly urbanized (500–1000) | 3.3 | 2.3 | 3.6 | 2.7 | 3.0 | 2.6 | 18.5 |
| Not urbanized (<500) | 0.0 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | 18.5 |
| Disposable household incomej (%) | |||||||
| 1st quintile (lowest) | 23.7 | 17.4 | 21.8 | 26.9 | 22.4 | 23.3 | 20.0 |
| 2nd quintile | 15.6 | 16.4 | 15.7 | 17.4 | 16.2 | 15.2 | 20.0 |
| 3rd quintile | 17.9 | 19.5 | 18.5 | 18.6 | 20.7 | 18.8 | 20.0 |
| 4th quintile | 20.0 | 22.3 | 20.8 | 19.0 | 20.8 | 21.0 | 20.0 |
| 5th quintile (highest) | 22.8 | 24.4 | 23.3 | 18.0 | 19.9 | 21.8 | 20.0 |
| Education levelk (%) | |||||||
| Primary to lower secondary | 37.9 | 40.3 | 36.8 | 27.0 | 80.2 | 16.3 | 33.2 |
| Higher secondary or vocational | 28.6 | 30.3 | 29.4 | 38.5 | 18.0 | 34.0 | 38.6 |
| Bachelor’s or master’s | 33.5 | 29.4 | 33.8 | 34.4 | 1.8 | 49.7 | 28.2 |
| Country of originl (%) | |||||||
| The Netherlands | 58.5 | 67.5 | 66.2 | 66.9 | 64.9 | 60.5 | 78.6 |
| Surinam | 3.6 | 3.7 | 4.1 | 5.6 | 3.5 | 5.0 | 2.1 |
| Morocco | 2.6 | 2.9 | 2.9 | 3.6 | 5.0 | 4.5 | 2.2 |
| Indonesia | 2.6 | 2.9 | 2.7 | 2.9 | 0.6 | 2.9 | 2.2 |
| Middle or eastern Europe | 5.6 | 2.7 | 3.3 | 1.8 | 3.0 | 4.0 | 1.2 |
| Turkey | 2.9 | 2.3 | 3.0 | 3.6 | 4.1 | 4.1 | 2.4 |
| Antillean isles | 1.8 | 1.7 | 1.8 | 2.0 | 2.0 | 2.1 | 1.0 |
| UK | 1.3 | 1.0 | 0.9 | 0.9 | 0.9 | 0.8 | 0.5 |
| Germany | 0.8 | 1.0 | 0.9 | 0.9 | 0.1 | 0.5 | 2.2 |
| Other countries | 20.2 | 14.3 | 14.2 | 11.9 | 15.9 | 15.8 | 10.9 |
GP, general practice; IQR, interquartile range; MHC, mental healthcare; NA, not available (unavailable or undisclosed due to low numbers); SN, Statistics Netherlands.
Data on the citizens of the ELAN area from SN and the municipalities.
Data on the citizens of the ELAN area from the affiliated GPs.
Data on citizens of the ELAN area with a hospital claims declaration.
Data on the citizens of the ELAN area with a mental healthcare claims declaration.
Data on the citizens of the ELAN area from the Perined population (national data source with information on pregnancy and perinatal care).
Open-source data on the population of the Netherlands from SN (year 2014 and mid-year population 2021) [13,14].
Total population for years 2007–22.
Population on 1 July 2021.
Urbanization defined by number of addresses per squared kilometre.
Quintile boundaries of disposable household income by the quintile distribution of the Netherlands.
Highest attained and followed education level.
Country of origin of individual or one/both parents (nine largest subgroups of the area).